JOHNSON PUMP
Viking Power Drain / Gray waterpumps Modern, single-chamber, self-
suction membrane pumps that can be
configured in a variety of ways. Can be installed as a bilge pump
in any leisure boat. The function-safe check valves make
filters superfluous. The pumps can run dry and also pump
a mixture of air and water without difficulty.
JABSCO
Drain / Gray Water Pumps Membrane pumps are self-suction and dry-running safe, they have built-in non-return valves that prevent water from flowing back into the hose.
A very good alternative such as bilge pump and drainage of gray water.